multirotor_att_control: use PID lib for yaw rate control
multirotor_att_control: style fixes, cleanup
multirotor_pos_control: failsafe against invalid yaw setpoint in AUTO
missionlib: Added geo.h include, without this the _wrap_pi function returned garbage (e.g. for the yaw setpoint in auto)
Merge pull request #522 from PX4/hotfix_yaw_auto_bug

missionlib: Added geo.h include,
Merge branch 'master' into yaw_pid_fix
Don't limit the PWM output maximum for the IRIS to use the whole thrust range
fix MEAS airspeed and airspeed calibration
Merge pull request #525 from thomasgubler/airspeed_meas_calibration

fix MEAS airspeed and airspeed calibration
mkblctrl startup script changed
Fix user abort behave in test

Now the pwm ouput return to the last value before test (useful and safer when testing ESCs).
Merge pull request #526 from Thiago0B/master

Fix user abort behave in test
mkblctrl startup script cleanup
Merge pull request #527 from NosDE/master

mkblctrl startup script changed
Mavlink VFR message publication fix
Merge pull request #528 from PX4/mavlink_vfr_fix

Mavlink VFR message publication fix
Merge pull request #524 from PX4/hotfix_iris_max_pwm

IRIS PWM range
Merge branch 'yaw_pid_fix' of github.com:PX4/Firmware
Merge branch 'yaw_auto_failsafe' of github.com:PX4/Firmware
Updated backside controller/ added backside config.